But getting to your brain cells is tricky, and amino acids have to compete for limited access.

但胺基酸不容易到达脑细胞，而且必须竞争有限的机会。

You may remember that amino acids are unique, in that they have nitrogen in their amine groups.

你可能记得氨基酸是独一无二的，因为它们的胺基中含有氮。

Meanwhile, proteins and amino acids, the building block nutrients of growth and development, manipulate how we feel and behave.

同时，白质和胺基酸是生长和发育的基本营养，影响我们的感觉和行为。

Tetrodotoxin is covered on its surface with polar alcohol and Amin groups.

河豚毒覆盖有极性醇和胺基。

But the amine group isn't used in those storage molecules, so it's converted to NH3, or ammonia, which happens to be toxic.

但是胺基没有用于那些储存分子，所以它被转化为 NH3，也就是氨，碰巧有毒。

Now, genes are short segments of DNA that code for amino acids.

是组成胺基酸的密码。

And amino acids are the building blocks of proteins.

而胺基酸是白质组成的元件。

Remember, ammonia is NH3, so that " am" from ammonia gets stuck onto that amine group.

记住，氨是NH3，所以氨的那个“am”就附着在胺基上了。

That, along with it containing tyrosine, an amino acid that aids neurotransmitter production, may make it hard to get some rest if you have a bunch of protein before bed.

因为它含有酪氨酸，酪氨酸是一种帮助合成神经传递物质的胺基酸。因此如果你在睡前食用白质类食品，便可能造成睡眠困难。